v3.26.1
Discontinued Operations - Net Losses from Discontinued Operations, Net of Tax in our Statements of Operations (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Operating income $ (22.1) $ (21.4)  
Net earnings (loss) (35.8) (115.0) $ (536.7)
Net income (loss) attributable to noncontrolling interest (3.7) (2.0)  
Net income (loss) attributable to Dun & Bradstreet $ (32.1) (113.0) $ (525.0)
Discontinued Operations, Held-for-Sale or Disposed of by Sale | Dun And Bradstreet Corporation      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Total revenues   579.8  
Operating income   35.3  
Earnings (loss) before income taxes   (14.8)  
Net earnings (loss)   (14.8)  
Net income (loss) attributable to noncontrolling interest   1.0  
Net income (loss) attributable to Dun & Bradstreet   $ (15.8)